History

Irolas came down to the gate after Faramir had pulled out of Osgiliath, and praised the wisdom of Denethor. Soon after, he saw that wisdom again in play as he had to bring the severely wounded Faramir to his lord. Dumbfounded, Irolas witnessed the total breakdown of Denethor as he ordered everyone to abandon their posts.

Etymology

Irolas is obviously an anagram of the canonical name Iorlas (the same way the character Madril is derived from Mardil Voronwë) however there is no actual background or etymology behind it.